Truing device for truing shaped cutters in running cutter-heads.



G. W. H. BLOOD.

TRUING DEVICE FOR TRUING SHAPED OUTTERS IN RUNNING GUTTER HEADS.

APPLIOATION FILED snmzzz, 1909.

944,010. Patented Dec. 21, 1909.

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STATES QFFICE.

CHARLES W. H. BLOOD, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO S. A. WOODSMACHINE COMPANY, OF BOSTON, MASSACHUSETTS.

TRUING DEVICE FOR TRUING SHAPED To all whom it may concern:

Be it known that I, CHARLES IV. E. Biioon, a citizen of the UnitedStates, residing at Boston, in the county of Suffolk and State of htassachusetts, have invented an Improvement in Truing Devices for TruingShaped Cutters in a Running Cutter-Head, of which the followingdescription, in connection with the accompanying drawings, is aspecification, like numerals on the drawings representing like parts.

My invention is an improvement on the truing device of my Patent No.858,56 July 2, 1907, whereby shaped or formed cutters in a cutterheadrotating at high speed may all be trued or broughtinto identically thesame cutting planes notwithstanding that their edges are not straight.

In carrying out my invention I make the grinder or truing tool and itscarriage movable transversely as well as longitudinally of the swingingguide bar and provide on the latter a fixed profiling pattern engaged bya follower which correspondingly controls the transverse movement of thecan riage and hence of the truing tool.

In its preferred embodiment my invention includes a rider having a knifeedge for hearing on the pattern and governing said follower. Also in itspreferred embodiment the invention includes means for converting theapparatus from a profiling truing device to a straight-edge-cuttertruing device.

The constructional details and various advantages of my invention willbe pointed out more at length in the course of the following descriptiontaken with reference to the accompanying drawings, in which I have showna preferred embodiment of the invention.

In the drawings, Figure 1 shows the apparatus in its operative relationto a cutterhead, looking at the same against the vertical side of theguide bar; Fig. 2 is a transverse sectional view thereof on the line 22Fig. 1; Fig. 3 is a vertical sectional view on the line showing theparts in their preferred inclined position; and Fig. 4: is a fragmentarytop plan view, the heads of the adjusting screws being omitted.

For convenience, I have illustrated my invention as applied to thespecific kind of guide bar 1 or support shown in my patent abovementioned, the same being pivoted at 2 on a suitable part 3 of theplaning machine Specification of Letters Patent.

Application filed September 22, 1909.

CUTTERS IN RUNNING CUTTER-HEADS.

Patented Dec. 21, 1909.

Serial No. 518,986.

and provided with longitudinal dove tail ways 4, 5, on which travels alongitudinal sliding tool carriage G. In this longitudinal carriage ismounted, to be carried thereby as a part of the tool carriage, a toolcarrier 7 mounted in vertical dove-tail ways 8 in the slide carriage 6for free vertical movement transversely of the guide bar 1. At its lowerend it carries a truing tool 9 herein shown as a stick of emery clampedbetween blocks or plates 10, 11, four of said sticks of emery beingherein shown as clamped in position on said blocks, which are pivotallymounted on a central bolt 12 and clamped together by bolts 13 so as tohold the sticks of emery in place. At its top the carrier '7 has alaterally extending or overhanging portion let in which are mounted ascrew follower 15 and a stop screw 16. Said follower screw 15 is for thepurpose of following the profile which, as herein shown, consists of aprofile or pattern plate 17 supported on a ledge 18 and held immovablyclamped by a bolt 19. The upper edge of the profiling plate or patternplate 17 is shaped to correspond exactly to the cutting edge of thecutters 20 shown in the figures in their relativepositions with relationto a cutterhead 21. For still greater accuracy I prefer to interpose arider ha ving a knife edge to rest on the profiling edge of the plate 17and normally held against the screw 15 by a spring 23 between its rearend and the part 24: of the carriage. Said rider has a horizontalportion 25 pivoted at 26 to the carriage (3 and the latter isreciprocated by a threaded rod or feed screw 27 herein shown as operatedby a crank 28. The screw 16 is provided to be screwed down against theadjacent edge of the carriage 6 whenever it is desired to stop thenormal transverse profiling movement of the carrier 7 so as to use thetruing device for truing straight-edge cutters. The free end of theguide bar 1 is clamped and supported in the same manner as shown in mypatent before mentioned. by a plate 29, hand screw 30, and adjustingscrew 31.

In use, the parts having been properly adjusted, the operator simplyturns the crank 28 so as to move the slide carriage back and forth onthe guide ways 1, 5, and as this movement takes place the transverselymoving carrier plate 7 is caused antomatically to rise and fall underthe control of the profile or pattern plate 17 whose shaped top edgecauses the parts 25 and 15 to rise and fall thereby carrying with themthe carrier 7 and truing tool or emery stick 9 which thereby quicklybrings all the cutters 20 of the rapidly rotating cutterhead intoaccurately trued condition. If a cutterhead with straight knives is tobe trued, the follower screw 15 is screwed upwardly out of the way, therider 22 being automatically raised correspondingly by its spring Qt,and the stop screw 16 is then screwed down against the carriage 6 so asto adjust the emery knife into exactly such position as is required forthe straight knife cutterhead, and thereupon the carriage and truingtool are reciprocated back and forth by the screw 27 the same as beforeexcepting that, inasmuch as the screw 16 is screwed down, there is notransverse movement of the truing tool 9 which remains stationary withrelation to the rest of the carriage.

It will be understood that my invention is applicable to the variousforms of cutterheads and kinds of planingmachines and that accordingly Iam not limited to the constructional details herein shown as statedpreferred embodiments of the invention, excepting as otherwise requiredby certain of the more limited claims.

Having described my invention, what I claim as new and desire to secureby Letters Patent, is:

1. In a wood planer, a truing apparatus for truing a shaped cutterhaving an indented edge, comprising a truing tool, supporting means forsaid truing tool movable longitudinally of said cutter, and controllingmechanism for guiding the engaging end of said tool in and outtransversely of said longitudinal movement in accordance with therequired shape to which said cutter is to be trued.

2. In a wood planer, a truing apparatus, comprising a truing tool toengage the indented edge of a shaped cutter, supporting means for saidtruing tool movable longitudinally of said cutter, and controllingmechanism including a pattern member for giving said tool a transversemovement simultaneously with said longitudinal movement, in accordancewith the desired shape of the cutterhead.

3. In a wood planer, a truing apparatus, comprising a truing tool toengage the indented edge of a shaped cutter, supporting means for saidtruing tool movable longitudinally of said cutter, and controllingmechanism including a profile plate having an edge corresponding inshape to the desired shape of the cutter, and means movable with saidtool for engagement with said shaped edge to correspondingly move thetool as the latter is moved longitudinally of the cutter.

4. In a wood planer, guiding means ex tending lengthwise of a cutterheadwhose cutters are to be trued, a carriage mounted to move on saidguiding means, a truing tool carried by said carriage, and meansproviding said tool with a predetermined move ment on said carriagetransversely of. said guiding means in accordance with the desired shapeof the cutters.

'5. In a wood planer, guiding means eX- tending lengthwise of acutterhead whose cutters are to be trued, a carriage mounted to move onsaid guiding means, a tool carrier transversely movable on saidcarriage, a truing tool mounted on said carriage, and controlling meansfor moving said carrier and tool toward and from the cutterhead as thecarriage reciproeates longitudinally thereof.

6. In a wood planer, guiding means ex tending lengthwise of a cutterheadwhose cutters are to be trued, a carriage mounted to move on saidguiding means, a tool carrier transversely movable on said carriage, atruing tool mounted on said carrier, and controlling means including aprofile plate for moving said carrier and tool toward and from thecutterhead as the carriage reciprocates longitudinally thereof.

7. In a wood planer, guiding means eX tending lengthwise of a cutterheadwhose cutters are to be trued, a carriage mounted to move on saidguiding means, a tool carrier transversely movable on said carriage, atruing tool mounted on said carrier, and controlling means including astationary profile plate on said gulding means, and an adjustablefollower on said carriage. for moving said carrier and tool toward andfrom the cutterhead as the carriage reciprocates longitudinally thereof.

8. In a wood planer, a guide bar extending lengthwise of a cutterheadwhose cutters are to be trued, a truing tool movable on said guide bar,controlling means for giving said tool a movement toward and from thecutterhead in connection with said longitudinal movement, and means forrendering said controlling means inoperative and maintaining said toolin a rectilinear movement parallel with said cutterhead.

9. In a wood planer, a truing tool, means to guide said truing toollongitudinally of a cutterhead whose cutters are to be trued, and meansfor providing said tool with a movement toward and from the cutters inconnection with said longitudinal movement, including a profile plateand a knife edge follower device for sliding on said profile plate andthereby moving the tool in accordance therewith.

10. In a wood planer, a truing tool, means to guide said truing toollongitudinally of a cutterhead whose cutters are to be trued, a carriagemovable on said guiding means, a

feed screw for feeding said carriage on said carrier in position to bebrought successively, guiding means, a truing tool movable with asdesired, into operative position for trunig said carriage, and means forautomatically said cutters.

moving said tool toward and from the cut- In testimony whereof, I havesigned my 5 terhead as said feed screw operates. name to thisspecification, in the presence of 15 11. In a wood planer guiding meansfor two subscribing Witnesses. guiding a truing tool with relation tothe CHARLES V. H. BLOOD. cutters of a cutterhead which are to be trued,Witnesses: a pivoted tool carrier clamping means there- IILLIAM O.Vnnnrr'ms,

10 for, and a plurality of tools carried by said CARL G. OSTEMAN.

